(14,462kb pdf) Gladwin compares the previous work done on the architecture of the Flagstaff culture by Colton, Spicer, McGregor and Hargrave with tree-ring dating done by Douglass and McGregor and concludes that the tree-rings dates are in direct...

A digital archive of historic standards drawings for transportation construction in Arizona. Some revisions include only the revised pages, some include the complete document. This title contains one or more publications.